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TEMPERATURE SCALETOPIC 10 : TEMPERATURE

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TEMPERATURE

The degree of

how hot or cold

a body is.

A measure of the average

kinetic energy of the

molecules of the body.

Definition

Kinetic Theory of Matter

Accurately measured by a THERMOMETERPreparedbyCgEdnaMariaHjOsman.E-ma

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THERMOMETERSInstruments used to measure temperature.

Body Surroundings FoodPreparedbyCgEdnaMariaHjOsman.E-mail:edna.maria.osman@gmail.com

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LOOK AT ME CLOSELY !

WHAT AM I ?

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Volume

E.m.fCurrent

Gas

pressure

Resistance

Length

Colour

THERMOMETERSUse thermometric substances to measure temperature.

ThermometricSubstances

Substances that have

physical quantities

that changescontinuously with

temperature.PreparedbyCgEdnaMariaHjOsman.E-mail:edna.maria.osman@gmail.com

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THERMOMETERSPICTURES OF VARIOUS TYPES OF THERMOMETERS!

Liquid-in-GlassThermometer

Thermocouple PreparedbyCgEdnaMariaHjOsman.E-mail:edna.maria.osman@gmail.com

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THERMOMETERSPICTURES OF VARIOUS TYPES OF THERMOMETERS!

Gas-FilledThermometer

ResistanceThermometer

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THERMOMETERSPICTURES OF VARIOUS TYPES OF THERMOMETERS!

Aquarium Thermometer Mood Ring

Using Thermochromic Liquids

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TEMPERATURE SCALE

A range of numbers for measuring the level of hotness.

Definition

COMMONTEMPERATURE

SCALES

CENTIGRADE SCALE

FARENHEIT SCALE

KELVIN SCALE PreparedbyCgEdnaMariaHjOsman.E-mail:edna.maria.osman@gmail.com

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TEMPERATURE SCALE

Choosing two suitable

temperatures known as

fixed points.

A range of numbers for measuring the level of hotness.

Definition

Determination of

Temperature ScaleDivide the range between the

fixed points into a number of

equal division.

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THE CENTIGRADE SCALEAlso known as the Celsius Scale

TWO FIXEDPOINTS

ICE POINT

STEAM POINT

Temperature of pure

melting ice at 1 atm.

Assigned a value of

0 degrees Celsius.

Temperature of steam from

boiling water at 1 atm.

Assigned a value of

100 degrees Celsius.

Space between ice point and steam point is divided into 100 equal parts

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The lowest possible temperature that

exists in the universe - the absolute zero.

Based onTheory

THE KELVIN SCALEAlso known as the Absolute Scale

Kelvin (K)

SI unit ofTemperature

The temperature at

which all possible

thermal energy has

been transferred

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KELV

IN-CELS

IUSSCALE

COM

PARISON

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KELVIN-CELSIUS CONVERSION

Celsius to Kelvin

Kelvin to Celsius

Temperature in

Degree Celsius + 273

Temperature in

Kelvin - 273

Absolute Zero = 0 K = - 273 degrees Celsius

273 K = 0 degrees CelsiusPreparedbyCg

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KELVIN-CELSIUS CONVERSION

Convert these temperatures from Celsius to Kelvin

1. 825

2. 273

3. 100

4. 735. 8

6. -23

7. -58

8. -100

9. -24510. -273

0C

0C

0C

0

C0C

0C

0C

0C

0

C0C

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KELVIN-CELSIUS CONVERSION

Convert these temperatures from Kelvin to Celsius

1. 514 K

2. 428 K

3. 316 K

4. 273 K5. 245 K

6. 167 K

7. 100 K

8. 73 K

9. 58 K10. 24 K

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THE CENTIGRADE SCALEAlso known as the Celsius Scale

TWO FIXEDPOINTS

ICE POINT

STEAM POINT

Temperature of pure

melting ice at 1 atm.

Assigned a value of

0 degrees Celsius.

Temperature of steam from

boiling water at 1 atm.

Assigned a value of

100 degrees Celsius.

Space between ice point and steam point is divided into 100 equal parts

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USING PHYSICAL PROPERTY TO

CALCULATE TEMPERATURE

Know the

length at

Ice point

Using the changes in LENGTH of liquid column

to determine TEMPERATURE

Know the

length at

Steam point

Find the

length at

Unknown

temperature

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USING PHYSICAL PROPERTY TO

CALCULATE TEMPERATURE

Length at

Ice point

Using DIRECT PROPORTION as the physical

property is proportional to temperature

Length at

Steam point

Length at

Unknown

temperature

Length at

Ice point-

-

X= 100Unknown

temperaturein

0C

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GENERAL EQUATION FOR THE

CENTIGRADE SCALE

Ice pointSteam point

Unknown

temp

-

-X= 100

Unknown

temperature

in

0C X XIce pointXX

is the physical property which changes with temperature.

X

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USING PHYSICAL PROPERTY TO

CALCULATE TEMPERATURE

Length at

Ice point

Using DIRECT PROPORTION as the physical

property is proportional to temperature

Length at

Steam point

Length at

Unknown

temperature

Length at

Ice point-

-

X= 100Unknown

temperaturein

0C

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KELVIN-CELSIUS CONVERSION

Celsius to Kelvin

Kelvin to Celsius

Temperature in

Degree Celsius + 273

Temperature in

Kelvin - 273

Absolute Zero = 0 K = - 273 degrees Celsius

273 K = 0 degrees CelsiusPreparedbyCg

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GENERAL EQUATION FOR THE

CENTIGRADE SCALE

Ice pointSteam point

Unknown

temp

-

-X= 100

Unknown

temperature

in

0C X XIce pointXX

is the physical property which changes with temperature.

X

PreparedbyCg

EdnaMariaHjOsman.E-m

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